Study

Conservation efforts at the Tana River Primate Reserve, Kenya

Actions

This study is summarised as evidence for the following.

Action Category

Permanent presence of staff/manager

Action Link
Primate Conservation

Run tourist projects and ensure permanent human presence at site

Action Link
Primate Conservation

Legally protect primate habitat

Action Link
Primate Conservation
  1. Permanent presence of staff/manager

    A before-and-after trial in 1975-1985 in swamp and riverine forest in Tana River Primate Reserve, Kenya found that despite permanent presence of reserve staff along with other interventions, Tana River red colobus Colobus badius rufomitratus and crested mangabeys Cercocebus galeritus galeritus decreased over a ten year period. Overall population size decreased from 1,200-1,800 to 200-300 individuals (83% decrease) for colobus and from 1,100-1,500 to 800-1,100 individuals (25% decrease) for mangabeys. The number of forest patches inhabited by these two species also decreased over time. No statistical tests were carried out to determine whether this decrease was significant. Results of total counts in 1985 and in 1973-1975 were compared to estimate population change. A permanent ranger post to house junior reserve staff was built in 1976. In the same year, the area became a National Reserve and from 1977-1981, a tourism enterprise with a permanent lodge was established and maintained in the reserve. The study does not distinguish between the effects of the different interventions mentioned above.

  2. Run tourist projects and ensure permanent human presence at site

    A before-and-after trial in 1975-1985 in swamp and riverine forest in Tana River Primate Reserve, Kenya found that despite the establishment of a tourism enterprise in the reserve along with other interventions, Tana River red colobus Colobus badius rufomitratus and crested mangabeys Cercocebus galeritus galeritus decreased over a ten year period. Overall population size decreased from 1,200-1,800 to 200-300 individuals (83% decrease for colobus and from 1,100-1,500 to 800-1,100 (25% decrease) individuals for mangabeys. The number of forest patches inhabited by these two species also decreased over the same time period. No statistical tests were carried out to determine whether this decrease was significant. Results of total counts in 1985 and in 1973-1975 were compared to estimate population change. A permanent tourist lodge was built in 1977 and was operated until 1981, offering game drives, boat trips and guided walks. In 1976, the area became a National Reserve including a permanent ranger post to house reserve staff. The study does not distinguish between the effects of the different interventions mentioned above.

  3. Legally protect primate habitat

    A before-and-after trial in 1975-1985 in swamp and riverine forest in Tana River Primate Reserve, Kenya found that after proclaiming the study area a National Reserve alongside other interventions, resident populations of Tana River red colobus Colobus badius rufomitratus and crested mangabeys Cercocebus galeritus galeritus decreased over ten years. Overall population size decreased from 1,200-1,800 to 200-300 individuals (83% decrease) for colobus and from 1,100-1,500 to 800-1,100 (25% decrease) individuals for mangabeys. In addition, the number of forest patches inhabited by these two species also decreased over time. No statistical tests were carried out to determine whether these decreases were significant. Results of total counts in 1985 and in 1973-1975 were compared to estimated population changes. A permanent ranger post was built in 1976 and from 1977-1981, a tourism enterprise with a permanent lodge was established in the reserve. The study does not distinguish between the effects of the different interventions mentioned above.

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust